Similar to a few PPs, a few years ago I was feeling swamped by DD's creativeness. Her and I struck a deal that it could be thrown/recycled/regifted if I took a photo of everything. At the end of the year I make her and now DS a photobook of that year's art.

I do not have enough room to keep everything so some stuff is stored in our shed and brought out periodically. Other than that we decide every few months if there is stuff to donate when I am doing a charity run, or I ask them if there is anything they love particularly as I want to do a clean out of all those little knick knack/plastic toys type things. When I do sort to remove I show them. They hardly ever mind.